The dosage of methimazole varies from manufacturer to manufacturer and is divided into 5mg/tablet and 10mg/tablet, and the usual maintenance dosage is 2.5mg~10mg, so one methimazole tablet a day is safer. Methimazole tablets are drugs for the treatment of hyperthyroidism, and can also be used for the preoperative preparation of hyperthyroidism, its main mechanism of action inhibits the synthesis of thyroid hormones. The initial dose of treatment is 20-40mg per day, and when the condition improves, the dose can be gradually adjusted, and the maintenance dose is 2.5-10mg. The use of this drug in some patients can cause hepatic reactions, manifested as elevated aminotransferases, as well as some patients with a decrease in whole blood cells. Therefore, thyroid function, liver function, and blood counts should be checked regularly during the treatment of hyperthyroidism. It is contraindicated in people who are allergic to methimazole and have moderate to severe blood count disorders. As methimazole tablets are prescription drugs, the specific use of this drug requires consultation with the relevant doctor.